just make it clear that they will be charged for any wasted time due to them getting the wrong materials, faulty stuff to be removed & new to be refitted etc
That's what I was thinking too.i have no problem with customer supplying parts. Often they want the bill to put through there own accounts.
I give them a mega deatailed list of what i want and where to get it. If i need anything i just text them a list and wait for delivery.
I need 4 screws, get a box of 200. need sleeving, have to have a 50M roll. Lots of left over perks on this type of job. When anything fails, pay me to come back and sort it out, if i havent supplied it, i wont replace it for free. Sometimes i prefer a customer to supply things because of this.
There is always wiggle room in every job, or else I make sure there is. I had a contractor (robot engineer) working for me, I wanted to supply materials, I walked into the local wholesalers one day with him, introduced him to the staff and said anything he wants let him get it and send the bill to me. Perhaps you could have a similar arrangement with this customer.
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